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  1. <?php
  2.  
  3. $text = "                　

Text\x0B\r\n\t";
  4. $res = preg_replace("/\s/u", "_", $text);
  5. echo $res;
  6.  
Success #stdin #stdout 0.01s 82944KB
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___________________Text____
https://ideone.com/AJV2ma
language:
PHP (php 7.3.5)
created:
8 years ago
visibility:
secret

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